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Addition Subtraction Strategies Practice

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Addition Subtraction Strategies Practice

Mathematical symbols and numbers

🧮 Part 1: Strategies and Estimation

1. Estimate first, then solve: 47 + 26

My estimate: _______ (round to nearest 10)

Actual answer: _______

2. Use partitioning to solve 84 - 37. Show your work:

84 = _____ + _____

37 = _____ + _____

Answer: _______

3. Check this answer using inverse operations: 63 + 28 = 91

To check, I can calculate: _______ - _______ = _______

Is the original answer correct?

Yes
No

4. Which strategy would be most efficient for 45 + 45?

Counting on

Using doubles

Partitioning

Making tens

📊 Part 2: Comparison Problems

5. Sarah collected 73 shells at the beach. Tom collected 48 shells. How many more shells did Sarah collect than Tom?

Number sentence: _______ - _______ = _______

Answer: Sarah collected _______ more shells than Tom.

6. A school has 156 Year 3 students and 89 Year 4 students. What is the difference between the number of Year 3 and Year 4 students?

Estimate first: _______

Answer: The difference is _______ students.

7. James has $42. He needs $67 to buy a new game. How much more money does he need?

Number sentence: _______ - _______ = _______

Answer: James needs $_______ more.

✏️ Part 3: Problem Solving and Reflection

8. Use the vertical method to solve: 125 + 287

Check your answer by estimating: _______

9. A library had 324 books. They gave away 156 books to other schools. How many books do they have left?

Answer: The library has _______ books left.

10. Reflection: Which addition or subtraction strategy helped you most today? Explain why.

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